/*++

  Copyright (c) 2004  - 2015, Intel Corporation. All rights reserved.<BR>
                                                                                   
  SPDX-License-Identifier: BSD-2-Clause-Patent
                                                                                   
--*/

#ifndef _EFI_PTT_PASS_THRU_H
#define _EFI_PTT_PASS_THRU_H

#define PTT_PASS_THRU_PROTOCOL_GUID \
  { \
    0x73e2576, 0xf6c1, 0x4b91, 0x92, 0xa9, 0xd4, 0x67, 0x5d, 0xda, 0x34, 0xb1  \
  }
// {073E2576-F6C1-4b91-92A9-D4675DDA34B1}
//static const GUID <<name>> = 
//{ 0x73e2576, 0xf6c1, 0x4b91, { 0x92, 0xa9, 0xd4, 0x67, 0x5d, 0xda, 0x34, 0xb1 } };


//#define EFI_PTT_PROTOCOL_GUID  HECI_PROTOCOL_GUID

typedef struct _PTT_PASS_THRU_PROTOCOL PTT_PASS_THRU_PROTOCOL;

/**
  This service enables the sending of commands to the TPM2.

  @param[in]      InputParameterBlockSize  Size of the TPM2 input parameter block.
  @param[in]      InputParameterBlock      Pointer to the TPM2 input parameter block.
  @param[in,out]  OutputParameterBlockSize Size of the TPM2 output parameter block.
  @param[in]      OutputParameterBlock     Pointer to the TPM2 output parameter block.

  @retval EFI_SUCCESS            The command byte stream was successfully sent to the device and a response was successfully received.
  @retval EFI_DEVICE_ERROR       The command was not successfully sent to the device or a response was not successfully received from the device.
  @retval EFI_BUFFER_TOO_SMALL   The output parameter block is too small. 
**/
typedef
EFI_STATUS
(EFIAPI *TPM2_SUBMIT_COMMAND) (
  IN PTT_PASS_THRU_PROTOCOL *This,
  IN UINT32                  InputParameterBlockSize,
  IN UINT8                   *InputParameterBlock,
  IN OUT UINT32              *OutputParameterBlockSize,
  IN UINT8                   *OutputParameterBlock
  );

/**
  This service requests use TPM2.

  @retval EFI_SUCCESS      Get the control of TPM2 chip.
  @retval EFI_NOT_FOUND    TPM2 not found.
  @retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
typedef
EFI_STATUS
(EFIAPI *TPM2_REQUEST_USE_TPM) (
  IN PTT_PASS_THRU_PROTOCOL *This
  );

typedef struct {
  EFI_GUID                           ProviderGuid;
  TPM2_SUBMIT_COMMAND                Tpm2SubmitCommand;
  TPM2_REQUEST_USE_TPM               Tpm2RequestUseTpm;
} PTT_TPM2_DEVICE_INTERFACE;


/**
  This service register TPM2 device.

  @param Tpm2Device  TPM2 device

  @retval EFI_SUCCESS          This TPM2 device is registered successfully.
  @retval EFI_UNSUPPORTED      System does not support register this TPM2 device.
  @retval EFI_ALREADY_STARTED  System already register this TPM2 device.
**/
typedef
EFI_STATUS
(EFIAPI *TPM2_REGISTER_TPM2_DEVICE_LIB) (
  IN PTT_PASS_THRU_PROTOCOL  *This,
  IN PTT_TPM2_DEVICE_INTERFACE   *Tpm2Device
  );
  
typedef struct _PTT_PASS_THRU_PROTOCOL {
  TPM2_SUBMIT_COMMAND             Tpm2SubmitCommand;
  TPM2_REQUEST_USE_TPM            Tpm2RequestUseTpm;
  TPM2_REGISTER_TPM2_DEVICE_LIB   Tpm2RegisterTpm2DeviceLib;
} PTT_PASS_THRU_PROTOCOL;

extern EFI_GUID gPttPassThruProtocolGuid;

#endif // _EFI_HECI_H
